Derrick



' PATBNTED FEB. 16,- 1904.

0. DANIELS.

DERRICK.

APPLIOATIOR IILED mm. 23. 1903.

2 SHEETS-SHEET 1.

N0 MODEL.

m EI pngmmna. wAsv-mmmxn. 1,-

No. 752,379. 7 PATENTBD FEB. 16, 1904.

v -o. DANIELS.

. DERRICK,

APPLICATION P I LED MAR. 23, 1903. 30 MODEL. 2 SHEETS-SHEBT 2- UNITED STATES Patented February 16, 1904.

OSCAR DANIELS, OF CHICAGO, ILLINOIS.

'DERRIQK.

SPECIFICATION forming part of Letters Patent N0. 752,379, dated February 16, 1904.

Application filed March 23, 1903.

To all whom it may concern.-

Be it known that I, Osonn DANIELS, a citi-. zen of the United States, and a resident of Chicago, in the county of Cook and State of Illinois, have inventd anImproved Derrick, of which the following isa specification. I This invention relates to derricks, and relates particularly to boom-derricks of the type comprising sleepers secured together,.prefer ably at right angles to each other, to form a supporting-base for the derrick, a mast piv-I otally supported in-upright position in a suitable bearing on said sleepers, sheer-legs pivotally connected to the top of the mast and rigidly connected to the sleepers at a distance from the base of said mast, and a boom, one end of which is pivoted to the lower end of said mast and the upper end of which is adapt ed to be raised and lowered by means of 2. cable secured thereto and passing over suitable sheaves or pulleys in the mast. The sleepers and sheer-legs of derricks of this type are usu-. ally located at angles of ninety degrees .to each other, thus making provision for swing ing the boom through two hundred and seventy degrees, the sheer-legs preventing movement of said boom through the remaining ninety degrees of the circle. When it is desired to work through the portion of .the circle thus blocked off by the sheer-legs, it is necessary to shift the derrick so as to allow the boom to swing through said space. With derricks of this type as at present constructed the sleepers overlap. each other, the bearing for the mast being formed directly over the overlapping portions thereof. Thus when it is desired to shift the derrick it is necessary to dismantle the entire derrick, taking down the boom, mast, and sheer legs, shiftthe sleeper so as to bring the space previously blocked off by the sheer-legswithin the range of the derrick, and to then reerect the derrick. To so shift the derrick involves a great deal of time and labor and corresponding expense. V

A primary object of the invention is to provide a derrick of this type which may be shifted so as to bring the space blocked off bythe sheer-legs within the range of operation of the boom Without dismantling the entire derrick Serial No. 149,100. on model.)-

and, in. fact, to provide a derrick of this type in which one of. the sheer-legs and sleepers may be detached and shifted by means of the derrick itself and again attached in such position that it will not interfere with the movement of the derrick through the remaining ninety degrees of the circle. I

Further objects of the invention are to provide an improved step-bearing for the lower end of the mast and to provide improved goosenecks for pivotally connecting the upper end of the mast to the sheer-legs. A derrick of my invention consists of the various features,combinations of features, and

an end view showing the means of connecting the two sleepers. Fig. 6 is a partial top plan view of the sheer-legs, showing the goosenecks connecting the same to the mast; and Fig. 7is an enlarged View of the step-bearing and adjunctive parts looking in the direction of the arrow in Fig. 4.

, Referring now. to the drawings, 1 designates the mast ofthe derrick; 2, the boom; 3 and 4:, the sleepers, and 5 and 6 the sheer-legs connecting the mast with the sleepers 3 and 4, respectively. As v preferably constructed the mast 1 consists of channel-bars 7, rigidly connected by lattice-bars 8, and the boom 2, the sleepers 3 and 4:,and the sheer-legs 5 and 6 are made of timbers of suitable size and strength. The specific construction of these elements, however, is immaterial, and they may be of any usual or approved construction and made of any desired material.

. A novel feature of a derrick of my invention consists in forming and supporting the step-bearing for the mast wholly on one of the sleepers, which may be called the fixed sleeper, and in providing means for detachably securing the other sleeper, which may be called the' movable sleeper, to opposite sides of said fixed sleeper, so that said movable sleeper may be detached from the fixed sleeper and secured to the other side thereof without unstepping the mast.

When it is desired to work in the space blocked off by the sheer-legs, as originally erected, it is only necessary to detach the movable sleeper and the sheer-leg connected thereto, shift them to the opposite side of the fixedsleeper, and secure them thereto, and by temporarily guying the mast by means of ropes or cables it is obvious that the derrick may be used for so shifting said movable sleeper and sheer-leg. It is obvious that a great economy in time and labor will be thus effected. To render this possible also, it is necessary that the pivot-bearing for the mast in the sheer-leg connected to said movable sleeper shall be above or overlie the pivot-bearing for the sheer-leg connected to the fixed sleeper, thus making provision for disconnecting the sheer-leg connected to the movable sleeper from the mast without disturbing the sheerleg connected to the fixed sleeper. As shown, the sleeper 3 is the fixed sleeper and the sleeper 4 is the movable sleeper. In the preferable construction shown the movable sleeper 4 is adapted to be detachably connected to the sleeper 3 in the following manner: Secured to the end of the sleeper 3, preferably at right angles thereto, is a short timber 9, preferably mortised and bolted to the sleeper 3. Secured to the end of the sleeper 4, which is to be connected to the sleeper 3, are plates 10, which project beyond the ends thereof and are adapted to embrace the sides of the cross member 9 at either end thereof and to be rigidly bolted thereto, suitable bolt-holes being formed in the plates 10 and in both ends of the cross member 9, in which the securing-bolts are interchangeable. The step-bearing for the lower end of the mast, which may be of any usual or improved construction, is secured upon the sleeper 3 and the cross member 9 in such position that it will not interfere with attaching the sleeper 4 to said cross member or detaching it therefrom.

In the preferable construction shown the step-bearing for the lower end of the mast consists of a base-plate 11, which rests upon and is secured directly to the sleeper 3 and the cross member 9. Secured upon said baseplate 11 is a bearing-plate 12, upon which rests a circular boss 13, formed on a plate 14, secured to the lower end of the mast. A

socket adapted to receive the circular boss or projection 13 is formed on the bearing-plate 12 by means of an angle-bar 15, bent into circular form and rigidly secured to the bearingplate 12. As shown also, the operating-cables run inside of the mast, a suitable hole or opening 16 being formed through the plates 11 and 12, the boss 13, and the plate 14, the relation being such that part at least of said hole or opening 16 will be outside of the sleeper 3 and-cross member 9, which will thus not interfere with the passage of the operatingcables. The operatingcables pass around sheaves 17 revolubly mounted in suitable bearings on the under sidev of the plate 11. As shown, said sheaves 17 are mounted on pins 18, secured in plates 19, secured to the under side of said plate 11.

" To prevent accidental unstepping of the mast, as might happen in handling a load in the direction of either of the sleepers and beyond the point of attachment of the sheerleg thereto, the mast and its step-bearing are provided with interlocking parts, one thereof being detachable to provide for unstepping the mast when desired. As shown, a groove 20 is formed in the boss 13,With which flanges 21 on plates 22, bolted to the circular member 15 of the mast-bearing, are adapted to engage. When it is desired to unstep the mast, the plates 22 are detached, thus releasing said mast from its step-bearing.

A further feature of my invention consists in providing improved goosenecks which form the connection between the sheer-legs and the upper end of the mast and in which the upper pivot-bearing for the mast is formed. My improved goosenecks consist of plates '23, secured to the sheer-legs, the ends of which project beyond the ends of the sheer- 1 leg and are bent in the usual manner, so that when in position they will be at right angles to the axis of the mast 1. My improved goosenecks also comprise double anglebars 24, secured between the sheer-legs and the plates 23, the sheer-legs being provided with suitable slots or openings to receive the vertical flanges of said angle-bars. The angle-bars 24 extend flush with the ends of the plates 23.

Formed in the projecting ends of the plates 23 and the flat portions of the angle-bars 24 are circular openings which form the bearings for the pivot-pin secured in the end of the mast. To provide for separately detaching the sheer-leg 4 as and for the reasons heretofore explained, the gooseneck on said sheer-leg 4 is above or overlies the gooseneck on the sheer leg 3, and to allow the plates 23 thereon to come into contact with the flat portion of the gooseneck on the sheer-leg 3 the flanges of the anglebars 24 of the gooseneck on said sheer-leg 3 are cut away for a distance from the end thereof equal to the width of the gooseneck on the sheer-leg'4. As shown also, the flange of the gooseneck on the sheer-leg 4 is cut away outside of the pivot-bearing therein.

A gooseneck ofmy invention thus comprises a flanged member, the flange of which is continuous over the bent portion of said gooseneck. Said gooseneck will thus be very strong at the point where it is bent, so that there will beno likelihood of its breaking at this point, whereas goosenecks as at present constructed are weak at this point and are apt to break in use, thus causing an accident, the dangers of which are obvious.

I claim 1. A boom-derrick comprising a fixed sleeper and a movable sleeper, means to detachahly secure said movable sleeper to opposite sides of said fixed sleeper, and a mast provided with abearing supported wholly on said fixed sleeper, substantially as described.

2. A boom-derrick comprising a fixed sleeper and a movable sleeper, means to detachably secure said movable sleeper to opposite sides of said fixed sleeper, amast provided with a bearing supported Wholly on said fixed sleeper, and sheer-legs which connect said mast with said sleepers, the gooseneck on the sheer-leg connected to the movable sleeper being above the gooseneck on the sheer-leg connected to the fixed sleeper, substantially as described.

3. A boom-derrick comprising afixed sleeper and a movable sleeper, means to detachably secure said movable sleeper to opposite sides of said fixed sleeper, a mast provided with a bearing supported on said fixed sleeper and comprising a bearing-plate, and an angle-bar bent into circular form and secured to said bearing-plate, forming a circular socket adapted to receive the lower end of the mast, and

sheer-legs which connect said mast with saidnected to the movable sleeper being above the gooseneck connected to the fixed sleeper, substantially as described;

4. A boom-derrick comprising a fixed sleeper and a movable sleeper, means to detachably secure said movable sleeper to opposite sides of said fixed sleeper, a mast provided with a bearing supported wholly on said fixed sleeper and comprising a bearing-plate which rests upon and is secured to said fixed sleeper, and an angle-bar bent into circular form and secured to said bearing-plate forming" a circular socket adapted to receive the lower end of the mast, and sheer-legs which connect said mast with said sleepers, the gooseneck on the sheerlegs connected to the movable sleeper being above the gooseneck connected to the fixed sleeper, said goosenecks comprising flange members, the flanges of which are continuous over the bent portions of said goosenecks, substantially as described. 1

In testimony that I claim the foregoing as my invention I afiix my signature, in presence of two subscribing witnesses, this 14th day of March, A. D. 1903.

OSCAR DANIELS. Witnesses:

CHAS. L. OSTENFELDT, M. S. SOMERVJLLE. 

